Spectra GM12B Fuel Tank

Spectra GM12B Fuel Tank for GM Full-Size Classics

The Spectra GM12B fuel tank is an OE-style replacement for select Cadillac, Buick, Chevrolet, Oldsmobile, and Pontiac full-size vehicles. Built for direct-fit service, it supports proper fuel storage and restoration work on classic GM platforms.

• OE replacement fuel tank for select 1977-1988 GM applications
• Measures 39-3/4 in. x 26-1/2 in. x 9-1/4 in. on listed applications
• Lock ring kit included where specified in fitment notes
• Applications listed without a filler neck
• Cross-reference part numbers include 559453 and FLGM12B

Fitment Details

Compatible with select full-size GM vehicles, including Fits 1987-1988 Cadillac Brougham, N/A; Fits 1986 Cadillac Fleetwood, N/A; Fits 1977-1980 Oldsmobile Delta 88, N/A; Fits 1977-1979 Buick LeSabre, N/A; Fits 1977-1979 Chevrolet Caprice, N/A; Fits 1977-1979 Chevrolet Impala, N/A; Fits 1977-1979 Pontiac Bonneville, N/A; Fits 1977-1979 Pontiac Catalina, N/A; Fits 1977-1979 Pontiac Laurentian, N/A; Fits 1977-1979 Pontiac Parisienne, N/A; and Fits 1978 Buick Riviera, N/A.

What This Fuel Tank Helps Address

• Rust, corrosion, or contamination inside the original tank
• Fuel leaks caused by age-related tank deterioration
• Poor fuel storage on restored or repaired classic GM vehicles
• Replacement needs after tank damage from road debris or impact
• Service issues on vehicles requiring a direct-fit tank replacement

Installation Notes and Tips

Verify the tank dimensions, filler-neck configuration, and application notes before installation. The listed fitments specify w/o filler neck, and some applications note a lock ring kit included. Confirm the vehicle’s original configuration against the fitment row for your exact Cadillac Brougham, Cadillac Fleetwood, Buick LeSabre, Chevrolet Caprice, Chevrolet Impala, Pontiac Bonneville, or Pontiac Catalina application.

Quality Assurance

Spectra Premium fuel tanks are engineered and manufactured with quality control processes intended to meet or exceed the performance of the original equipment they replace. The GM12B is built as a replacement fuel tank for classic GM fuel storage service.